# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1297616695 -3600
# Node ID 5cdebc45677d57c14b3dec8a6e70a4fa8451f3c1
# Parent  8e436083745123c19e3f4e8bb3360003c3a4253f
mbsinit: Don't crash for a NULL argument.

* lib/mbsinit.c (mbsinit): When the argument is NULL, return 1.
* tests/test-mbsinit.c (mbsinit): Check this behaviour.

diff -r 8e4360837451 -r 5cdebc45677d ChangeLog
--- a/ChangeLog	Sun Feb 13 11:59:12 2011 +0100
+++ b/ChangeLog	Sun Feb 13 18:04:55 2011 +0100
@@ -1,3 +1,9 @@
+2011-02-13  Bruno Haible  <bruno@clisp.org>
+
+	mbsinit: Don't crash for a NULL argument.
+	* lib/mbsinit.c (mbsinit): When the argument is NULL, return 1.
+	* tests/test-mbsinit.c (mbsinit): Check this behaviour.
+
 2011-02-13  Bruno Haible  <bruno@clisp.org>
 
 	Don't interfere with a program's definition of __attribute__.
diff -r 8e4360837451 -r 5cdebc45677d lib/mbsinit.c
--- a/lib/mbsinit.c	Sun Feb 13 11:59:12 2011 +0100
+++ b/lib/mbsinit.c	Sun Feb 13 18:04:55 2011 +0100
@@ -43,5 +43,5 @@
 {
   const char *pstate = (const char *)ps;
 
-  return pstate[0] == 0;
+  return pstate == NULL || pstate[0] == 0;
 }
diff -r 8e4360837451 -r 5cdebc45677d tests/test-mbsinit.c
--- a/tests/test-mbsinit.c	Sun Feb 13 11:59:12 2011 +0100
+++ b/tests/test-mbsinit.c	Sun Feb 13 18:04:55 2011 +0100
@@ -32,6 +32,8 @@
 {
   static mbstate_t state;
 
+  ASSERT (mbsinit (NULL));
+
   ASSERT (mbsinit (&state));
 
   if (argc > 1)